DrAyala Conducts an Experiment Where She Gives Half Her Participants

Multiple Choice

Dr.Ayala conducts an experiment where she gives half her participants a yellow pill containing a drug that keeps them awake during psychology lectures.She gives the other half of her participants an identical-looking yellow pill that does not contain the drug.This experimental design controls for ____.

A) experimenter bias
B) random variables
C) a placebo effect
D) confirmation bias